请根对象，然后写属性名称DATA，然后写入对象你只是写道：

Make the root object, then write the property name "DATA", then write the object you just wrote:

jsonWriter.WriteStartObject();
    jsonWriter.WritePropertyName("DATA");
    jsonWriter.WriteStartObject();
        jsonWriter.WritePropertyName("id");
        jsonWriter.WriteValue("234");
        jsonWriter.WritePropertyName("name");
        jsonWriter.WriteValue("abc");
    jsonWriter.WriteEndObject();
jsonWriter.WriteEndObject();